#include "stm32f10x.h"
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
uint16_t debug;
void usart_debug_init(void)
{
	USART_InitTypeDef USART_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA| RCC_APB2Periph_AFIO, ENABLE);

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
	

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;     
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

	USART_Init(USART1, &USART_InitStructure);

	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);

	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

	USART_Cmd(USART1, ENABLE);
	
}
void send_byte(uint8_t byte)
{
	USART_SendData(USART1, byte);
	while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);	
}

int fputc(int ch, FILE *f)
{
	send_byte(ch);
	return(ch);
}	

void USART1_IRQHandler(void)
{

	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) 
	{
		USART_ClearFlag(USART1, USART_FLAG_RXNE);
	}

}
